How to Shut up annoying Toads/frogs?

We have a small manmade pond in our back yard that is home to many fish. Every single night we hear these obnoxious sounds coming from the pond, which makes it very hard to sleep. We have gone back and discovered the source of all the racket, and it is these toads living in the pond. Their throat gets huge-like a huge bubble and they let out this unfriendly sound that lasts between 5 and 15 seconds. We have netted 20 of these toads ( i think they are toads since they are brown and warty) and have taken them down to a bigger pond down the street. Every night the same noise pursues, even after we just get rid of them. Any suggestions on how to get rid of them? Clearly removing them from the pond is not working, as I assume they just keep coming back. It has been giving my family so much discomfort and makes it extremely difficult to sleep. Any help would be appreciated!